Stair tread



M. FIORITTO Feb. 13, 1940.

STAIR TREAD Filed Feb. l5, 1959 2 Sheets-Sheet l Feb. 13, 1940. M. FloRlTTo 2,190,446

STAIR TREAD vFiledreb. 15, 1939 2 Sheets-sheet 2 ./7/5/7125/ Har/m7 v l Patented Feb. 13, 1940 Y n l UNITED STATES PAT-ENT "ferner p STAIR TREAD Mionoolni'oritto, ottowanil'is, ohio e .AllplicationxFlebruairy l15, 1939,;SeriaLNo. 256,441 l 4 claims. (Cl. 7.2496)y if' This kinvention `relates to preformed slabs of portionfrom this unit oppositelythere'from has tread type for stair noses, preferably of minor tongue portion IG. Additionally, as to the face mass as tothe ultimate step or tread'.l 8 there is projecting theretoward from these This invention has utility when incorporated openings i4.' tongues i1 yas reinforcing anchorin plastic or cementitio-us surfaced nosedportions age for this surface portion 8. Supplemental 5-y for steps, especially as reinforced and of ab-rathereto; tongue portions I3 project away from sive or non-slip properties. "the portion 3 as vto the sheet metal hacker 5` for Referring to the'drawings';l effective anchorage in the cement 3 or supplev Fig- 1 iS e fragmentary VieW virl SeCtiOrl Off a ymental plastic portion I9 which may be the rough t@ pail *0f Steps elrlbOdYirlg features 0f the' treed sub-coat for tile 2t as having finishedy filler ZI m nose herein; therewith'. in completing the yfloor surface eX- Fie- 2 is a perspective viewdnend section on tending from the tread edge providing portion an enlarged scale of the tread section of nose of 8,'9 This tread unit or section, instead ofbeing Fig. 1; i placed: with tile, may have a cast finish surface 15 Fie-3 is a perspective view of the vreinforcing .as terrazzo y22 or may be in conjunction with beek 01" Strip for the section of Fig. 1'; other plastic cast mass as cement `23 (Fig. 6). ,f Fig. Fi iS e SeCtiOrl 0n the line IV-IV, Fig,- 3, Ink connection with this anchorage for-the relsho'wingithe offset EAtongue features of the backtively thin ,mags of the, tread 8,there rnayobe p er fOr the Slab 0I' unit; v offsetV tongues 24 toward the face of the tread Fig- 5 iS e CrOSS SeCtiOn 0f d llrlit heVirlg feefrom the dovetails 25 (Fig. 5) with even reverseA 20 tures of the concealed metal reinforcement 0r tongues 26. Depending hacker portion as to the back in Variation from that 0f Fig. 33 edge 9 may be in strip 2T independentlyof any Fig. 6 is al View similar to Fig. 5 further offgi; 0r return bend of Fig. 3. adaptation of this unit in plastic mounting; Again, surface V may be to edge 28 (Fig..6)

Fig. 71S e fragmentary View Of e reillfOrCement as a more generally rounded nose and suchy to 25 in DOSI-.tion OI PI'OVdinlg' the backing fOl a tread. terminate 3,1', ledge 2Q frgm drop portion 30 0f V section and edge ior nOSe, parts being breken the `reinforcing back. There is thus positioned A away; this tread portion 'even as to steel riser 3I in 'a Fig. 8 isa plan View of the reinforcement secy Stell 1 y tiOIl Or metal 0f Fig. 7; f This light gage or thickness for the plastic may 30 Fig. 9 .is a. section of a tread having a cerne'nti-r be in the region of i@ to. 5k of an inch'with Such. tiOuS facing in e metal backing anchored as Substantial in tno bodyfor the surface aswell v adapted for preformed sheet covering such as as in thethjcknessfor the roundedor moreabrupi-lv linoleum; nose, This end is obtained with ,adhesive at- '35 Fig- 10 iS a fragmentary r11-en VieW 0f the ilitributesfin the magnesite or magnesium chlorid 35 stallatOri 0f Fig. 9; and Y cementl for eii'ective adherence with hardness'.

Fig, 11 iS e VieW 0f the ShOWirlg 0f Fig. 9 from properties enhanced even under changes of exthe leftposure conditions not only fromv wear lout mois- Stairway having deCk pOrtiOnS i and rSeI POI- turev due to the incorporation.'therewith of finely i .40 tions 2 may haVe the body 0T 'back 3 0f Cement dividedy copper. This metallic copper up to 10 4o In carrying out this invention, there is preformed Dey 4gen1; of weight disseminated through the a slab or relatively-miner Section 0f plastic i mass nas reaotant strength values to uphold` l on sheet metalvbacker Or'base 5, herein-shown as against attack 'having deveteils 6- extending longitudinally Furthermore, in this iooanon odjooent' thetheleOf With Supplemental anChOl'agC 7 i11- Da" free edge` of a step, importance arises for in- 45 31191 therewith This hacker is est@ Surface clusion therewith of vnon-slip properties. To this yPOrtiOrl 3 extending t0- edge 011105@ 9 having deend. ingredients with this Sorel. of magnesite ce-v pending cement ltrim frontface-IO reinforced by ment halvjng'the copper incorporated therewith depending portion Il of the backerfhavine teradvantageously also inoludoyaiuminum oxid as solnimle l2 With Offsetk tenglle I3 upwardly riSi-Ilg the abrasive agent. There is thus provided a '50 arid `erlibetideii remOte from endparellel t0 the wear surface of non-slip properties which may portion 1. i be attractively set up even in a range of color .Along theSe WeyS 0f this reirifOrCirig back, key 1 schemes in keeping with the stairway, flooring, 4openings I4 have struck out therefrom tongues tile, terrazzo, cement, or other combinations. i. u I5 toward theA drop portion I0 and amhorage` Cement body 3.24 (Fig. 7) herein is support for in preformed copper carrying abrasive surface 33 of cementitious or plastic on backing 34` of sheet metal reinforcement. This treadfacev 33 extends to nose 35. This sheet metal backing 34 may desirably be of non-corrosive or rustless steel. As'herein shown, riser is from terrazzo tread 3l therebelow. The abrasive and copper carrying tread slab 33 may extend from terrazzo 38, whether oor or the additional part of an intermediate step.

On tread foundation or step 39 `(Fig. 9) may be located metal back unit All having overhang margin portion 4l and upstanding tang'portions. 42 in diverging pairs, with front overhang 43.` In pocket 44 thus formed may be the cementi` tious plastic 45 coacting as a unit .therewith even in shallow form and it is effective non-"slip in including the aluminum oxid as abrasive; From this body portion there is drop portion 43 from the nose through'which screws 4l may pass at this exposed trim portion in effecting anchorage with the step body; From this pocket portion 44 may extend n A43 for anchoring screws 49. Floor coveringv material 53 as linoleum, sheet rubber, or like substance, as preformed, may be` United States Letters Patent'is:

l. A tread lunit comprising a cementitious tread face body portion, and parallel thereto a sheet metal anchorage and reinforcement por tion opposite from the face, `said latter portion having prong means extending into the cementitious portion short of the face, and additional l Adhesive or plastic coating evenas prong means oppositely extending away `:from

the face, said latter being effective as an anchorage for said unit in a base.

2. A tread section embodying a preformedy cementitious face, and a lmetal reinforcement l spaced from said face, said metal having parallel 1 ribs on'one side forming parallel grooves on the opposite side of said reinforcement, said ribs being in such proximity asl to form parallel grooves onthe same side thereof and therebetween, the grooves on the opposite side being in such proximity as to form parallel ribs therebe 'v tween, whereby the parallel ribs and grooves complementally register as anchoring means for the face and for a base upon which saidsection may be mounted.

` 3. A tread section embodying a cementitious body having a preformed cementitious face, and

a metal reinforcement having parallel riby means extending into the `body-toward said face, said rib means having key anchorage in the` bodyA holding the body against shifting `away from the reinforcement, there being openings providing ports through the reinforcement adjacent the rib means for additional effective anchoring of thebody With the reinforcement.

4. A tread section embodying a cementitious body having a preformed cementitious face-and a metal reinforcement spaced from the face, said reinforcement having a rib extending toward 3oY said face in providing key anchorage Withvthe`- body, and a fin extending outward fromthe rib away from the body as an extension, said extension being in the plane of the'reinforcement, `and anchoring screw means engaging said n Itoanchor the section with a base. v

MICHAEL rronrr'ro. 

